<template>
  <input type="text" v-model="v">
</template>

<script>
export default {
  data () {
    return {
      v: '',
    };
  },
  watch: {
    v (currentValue, prevValue) {
      console.log(currentValue, prevValue);
    },
  },
}
</script>

<style scoped>

</style>